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Coregonus oxyrinchus

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA ACTINOPTERYGII SALMONIFORMES SALMONIDAE

Scientific Name: Coregonus oxyrinchus
Species Authority: (Linnaeus, 1758)
Common Name/s:
English – Houting

Assessment Information [top]

Red List Category & Criteria: Extinct     ver 3.1
Year Assessed: 2008
Assessor/s Freyhof, J. & Kottelat, M.
Evaluator/s: Bogutskaya, N., & Smith, K. (IUCN Freshwater Biodiversity Unit)
Justification:
The species has not been recorded from its range (Southern North Sea basin: Schelde, Rhine and Meuse drainages) since about 1940.The species relied upon estuaries and brackish water to forage, where pollution was at it its most concentrated and coregonids are very sensitive to pollution. Many surveys have been undertaken since (most recently in 2005) within its previous range, and the species has never been recorded.
History:
1996 – Data Deficient (Baillie and Groombridge 1996)
1994 – Endangered (Groombridge 1994)
1990 – Endangered (IUCN 1990)

Geographic Range [top]

Range Description: Southern North Sea basin: Schelde, Rhine and Meuse drainages (exceptionally northern France). Ascended Rhine up to Köln [recorded to have reached Strasbourg (France) but this is probably erroneous]. Occasional records from southeast coast of England.
Countries:
Regionally extinct:
Belgium; France; Germany; Netherlands; United Kingdom
Range Map:
(click map to view full version)
5380_v1224016516

Population [top]

Population: Last recorded in 1940.

Habitat and Ecology [top]

Habitat and Ecology: Habitat:
In brackish water and main rivers; no evidence that it enters marine waters.

Biology:
Spawns in October-December in rivers. Young move to brackish habitats where they remain until mature. Feeds on zooplankton, supplemented by benthic invertebrates in adults.
Systems: Freshwater

Threats [top]

Major Threat(s): Pollution.

Conservation Actions [top]

Conservation Actions: None.
Citation: Freyhof, J. & Kottelat, M. 2008. Coregonus oxyrinchus. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 03 December 2008.
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